煤层气重复压裂技术在沁水盆地南部的应用

Application of CBM Repeated Fracturing Technology in Southern Qinshui Basin

目前的煤层气开发过程中,孔道堵塞和渗透率的降低会导致煤层气井产量下降,而重复压裂技术可以有效改善或者减缓该问题。重复压裂技术可以帮助清除近井地带污染,改善天然裂缝的网状沟通,从而更有效地进行排水降压,连通深部储层及井筒,同时可提高储层渗透率。本文针对沁水盆地南部煤层气井压裂作业,着重介绍了重复压裂技术的现场应用,为今后低产井改造处理作业提供了可靠的经验。

In the current process of CBM development, the pore blockage and the reduction of permea- bility will cause the decline of production, and the repeated fracturing technology can effectively improve or relieve this problem. The repeated fracturing technology can improve the communication of natural fractures by removing the pollution of wellbore area, thus drainage and decrease the pressure more effec- tively, connect the deep reservoir and wellbore, and can improve reservoir permeability. This paper is aimed at the fracturing operation of South Qinshui Basin CBM well, emphatica/ly introduces the field ap- plication of repeated fracturing technology, which could provide reliable experience for the future treat- ment of low production wells.